APA (7th ed.) Citation

Jonsson, L., & Flegg, J. (1978). Birds of lake, river, marsh and field. Penguin.

Chicago Style (17th ed.) Citation

Jonsson, Lars, and Jim Flegg. Birds of Lake, River, Marsh and Field. Harmondsworth ; New York [etc.]: Penguin, 1978.

MLA (9th ed.) Citation

Jonsson, Lars, and Jim Flegg. Birds of Lake, River, Marsh and Field. Penguin, 1978.